I got this ATO system off Amazon and it seems like a common enough one with decent reviews (and a lot of the exact same just under different brand names). I have it hooked up from a reservoir to my sump and got the optic sensor to right where I needed it… and then it just fills arbitrarily, always way overshooting the mark. Is it something I am doing or are these just unreliable? Do they just project a laser straight out in front of them and a stray wire could be setting it off? Or do the just detect water right at the surface of the sensor? I’m trying to troubleshoot this thing but it’s just been a pain for me so far. Thanks for any help.